BTW anyone who has not tried out o-rings
: I recommend giving them a try. There's also a video at the link.
The benefits are:
1. less noise and softer landing when bottoming out.
2. slightly shorter travel (but still enough to be able to avoid bottoming out)
At first it will feel weird, but give it an hour or two. After my initial test I liked them a lot and added some to my 3 Kinesis and 1 TE keyboard.